A MENS VINTAGE ESTATE STERLING SILVER SOUTHWESTERN TURQUOISE THUNDERBIRD RING. THE RING IS A SIZE 12.5 AND WEIGHS 15.4g. RING MEASURES 3/4" LONG. RING IS MARKED 925. NOT SURE IF STONE IS NATURAL OR MAN MADE. ANY QUESTIONS, PLEASE ASK. BE SURE TO CHECK OUT SOME OF MY OTHER GREAT ITEMS UP FOR SALE. THANK YOU